03309cas a2200253 a 450000500170000000800410001703500150005810000170007324501190009026000520020930000160026149000270027750001540030450200570045852021780051565000140269365000520270770000350275970000430279470000440283771000500288181000590293185600650299020260817163717.0110920s1989    th uu|m rtt   0|  a1eng d  a.b100716111 aThomas, John13aAn assessment of the use of rice bran as a fish feed in four areas of Udonthani province in the northeast Thailand  aBangkok :bAsian Institute of Technology,c1989  a70, [48] p.1 aThesis ;vno. AE-89-34  aA thesis Submitted in partial fulfilment of the requirements £or  the degree of Master o f Science, School of Environment, Resources and Development  aThesis (M.Sc.) - Asian Institute of Technology, 1989  aAn assessment of the use of rice bran as a fish feed was  carried out in four areas in Udon Thani province of the North east  Thailand, representi11g four agro-ecological zones in the region.  The study included a survey of fisl1 farming population in The  selected areas to assess t.li e use of rice bran as a fish feed;  evaluation of rice .bran samples collected from the field in terms  o f the quality; a storage study to evaluate l be quality changes  of rice bran on storage and a case study of two villages to study  The dynamics of rice bran marketing in the villages. Average  area of a fish pond was found to be 1 .16 ha , yielding on an  average 1 5 O O Kg/ha of which 20 . 1 per cent was us e d for home  consumption. The survey confirmed The earlier observation s l hat  rice bran was the most commonly used fish feed being used by 65 %  of the fanners. Farmer ' s awareness of the locally available feed  stuffs was a1so observed. The common fish pond inputs were  vegetables, termites, duck weed, ipomea and cassava leaf.  Differences in fish pond inputs used , reflected local  availability and agricultural practices of Ll1e area. 77 % of  the  farmers were found to use less than 1 Kg of rice bran and 44  % of  the farmers were found to feed rice bran once every day. Limited  availability of rice bran was reported to be the reason for  confining the use of rice bran . The low fish yie1d is attributed  to the low usage of feed inputs of which rice bran is a major  constituent. A clear difference in the proximate composition was  observed between the rough, smooth and mixed rice bran available  to the farmers. A rapid increase in free fatly acid was observed  on storage, indicating development of rancidity which was a major  reason restricting the storage of rice bran . Case study of  marketing of rice bran revealed that the existing marketing  system, was geared to the needs of the village , but the pig and  the duck subsystems were found l o be the major consumers of rice  bran, leaving the fish subsystems at a disadvantage Seasonal  differences in price and availabi1ity was observed depending on  the farming activities ln the village. 0aRice bran 0aFisheszThailandzUdon ThanixFeeding and feeds1 aLittle, David C.,eChairperson1 aEdwards, Peter,eExamination Committee1 aDemaine, Harvey,eExamination Committee2 aGovernment of Australia., eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. AE-89-34  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B17885